US3479117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical condenser system
Assignee: Farrand Optical Co Inc
•
Filing: 1966-06-02
•
Granted: 1969-11-18
•
Expires: 1986-06-02
Abstract
No abstract record available.
Inventors
- 👤 Albrecht W Tronnier
- 👤 Helmuth M Jeremias
- 👤 Arthur H Gottesman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:12
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1333304A
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US1868521A
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US1853778A
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US2140979A
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US2637242A
Cited
US2803163A
Cited
GB818229A
Cited
US3167998A
Cited
US3267802A
Cited
US3296923A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |